diff --git a/package/opencv4/Config.in b/package/opencv4/Config.in
index 23d34a9d22..a61a106952 100644
--- a/package/opencv4/Config.in
+++ b/package/opencv4/Config.in
@@ -30,6 +30,17 @@ config BR2_PACKAGE_OPENCV4_LIB_CALIB3D
 	  Include opencv_calib3d (camera calibration and 3d
 	  reconstruction) module into the OpenCV build.
 
+config BR2_PACKAGE_OPENCV4_LIB_DNN
+	bool "dnn"
+	# dnn needs fenv.h which is not provided by uclibc
+	depends on !BR2_TOOLCHAIN_USES_UCLIBC
+	help
+	  Include opencv_dnn (Deep Neural Networks) module into the
+	  OpenCV build.
+
+comment "dnn needs a glibc or musl toolchain"
+	depends on BR2_TOOLCHAIN_USES_UCLIBC
+
 config BR2_PACKAGE_OPENCV4_LIB_FEATURES2D
 	bool "features2d"
 	select BR2_PACKAGE_OPENCV4_LIB_FLANN
diff --git a/package/opencv4/opencv4.mk b/package/opencv4/opencv4.mk
index 0563026b18..84e0487dc4 100644
--- a/package/opencv4/opencv4.mk
+++ b/package/opencv4/opencv4.mk
@@ -92,6 +92,7 @@ OPENCV4_CONF_OPTS += \
 	-DBUILD_opencv_apps=OFF \
 	-DBUILD_opencv_calib3d=$(if $(BR2_PACKAGE_OPENCV4_LIB_CALIB3D),ON,OFF) \
 	-DBUILD_opencv_core=ON \
+	-DBUILD_opencv_dnn=$(if $(BR2_PACKAGE_OPENCV4_LIB_DNN),ON,OFF) \
 	-DBUILD_opencv_features2d=$(if $(BR2_PACKAGE_OPENCV4_LIB_FEATURES2D),ON,OFF) \
 	-DBUILD_opencv_flann=$(if $(BR2_PACKAGE_OPENCV4_LIB_FLANN),ON,OFF) \
 	-DBUILD_opencv_highgui=$(if $(BR2_PACKAGE_OPENCV4_LIB_HIGHGUI),ON,OFF) \